使用getter方法获取成员，或者如果没有成员，请尝试通过成员访问重试（如果它是公共的）。

/**

 * Copyright (c) 2003-2009, Xith3D Project Group all rights reserved.

 * 

 * Portions based on the Java3D interface, Copyright by Sun Microsystems.

 * Many thanks to the developers of Java3D and Sun Microsystems for their

 * innovation and design.

 * 

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions are met:

 * 

 * Redistributions of source code must retain the above copyright notice,

 * this list of conditions and the following disclaimer.

 * 

 * Redistributions in binary form must reproduce the above copyright notice,

 * this list of conditions and the following disclaimer in the documentation

 * and/or other materials provided with the distribution.

 * 

 * Neither the name of the 'Xith3D Project Group' nor the names of its

 * contributors may be used to endorse or promote products derived from this

 * software without specific prior written permission.

 * 

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) A

 * RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE

 *///from NowJava.com - 时  代  Java

import java.lang.reflect.Method;


public class Main{

    public static void main(String[] argv) throws Exception{

        Object object = "nowjava.com";

        String member = "nowjava.com";

        System.out.println(get(object,member));

    }

    /**

     * Get a member using a getter method, or if there isn't any,

     * try to retry it via member access if it's public.

     * 

     * @param object

     *                The object from which to get the member

     * @param member

     *                The member to get

     * @return The value of the member asked for, or null if there's no getter

     */

    public static Object get(Object object, String member) {


        Object value = null;


        try {

            // Try to find a getter

            Method met = getGetter(object, member);

            value = met.invoke(object, (Object[]) null);

        } catch (NoGetterException e) {

            try {

                // If impossible, try to return it via member access/** from 时代Java - N o w  J a v a . c o m**/

                value = object.getClass().getField(member).get(object);

            } catch (NoSuchFieldException ex) {

                throw new Error(

                        "Could not find either a getter or a field named "

                                + member + " in object of type "

                                + object.getClass().getSimpleName());

            } catch (Exception ex) {

                throw new Error(e);

            }

        } catch (Exception e) {

            throw new Error(e);

        }


        return value;


    }

    /**

     * Finds the appropriate the getter for an Object.

     * 

     * @param object The object

     * @param member The member

     * @return The getter for the specified member of this Object

     * @throws NoGetterException if no getter can be found

     */

    public static Method getGetter(Object object, String member)

            throws NoGetterException {


        String name = member.substring(0, 1).toUpperCase()

                + member.substring(1);


        Method met = null;